Suite's execute method takes a Stopper, whose stopRequested
method indicates a stop was requested. If true is returned by
stopRequested while a suite of tests is running, the
execute method should promptly
return even if that suite hasn't finished running all of its tests.

If a stop was requested via the Stopper.
Runner will report RunStopped
when the execute method of the run's starting Suite returns.
If a stop is not requested, Runner will report RunCompleted
when the last execute method of the run's starting Suites returns.

ScalaTest's Runner fires a RunCompleted report with an empty summary, because
the reporter is responsible for keeping track of the total number of tests reported as succeeded, failed, ignored, pending
and canceled. ScalaTest's internal reporter replaces the RunCompleted with a new one that is identical except
that is has a defined summary.

To create instances of this class you may
use the factory method. For example, given a report function named report, you could fire a RunCompleted event like this:

report(RunCompleted(ordinal))

ordinal

an Ordinal that can be used to place this event in order in the context of
other events reported during the same run

duration

an optional amount of time, in milliseconds, that was required by the run that has completed

summary

an optional Summary of the number of tests that were reported as succeeded, failed, ignored, pending and canceled

formatter

an optional Formatter that provides extra information that can be used by reporters in determining
how to present this event to the user

location

An optional Location that provides information indicating where in the source code an event originated.

payload

an optional object that can be used to pass custom information to the reporter about the RunCompleted event

threadName

a name for the Thread about whose activity this event was reported

timeStamp

a Long indicating the time this event was reported, expressed in terms of the
number of milliseconds since the standard base time known as "the epoch": January 1, 1970, 00:00:00 GMT